Extraction of copper from raw unroasted ores and other products.



Be. it Known that I, 'Gsons GEORGSCHNEDDER, F FEIEDEBURG, GEEIKAHY, ASSIGNQR T0 BUG-EN ABRESCH, 0F NEUSTADT-QN-THE HARDQ GERMANY.

nx'rneorroir or oorrnnrnomnaw UNROASTED ones auzo ornnn rzaczoccrs.

To all wit/om; it'may concern: v,

I SCHNEIDER, Koniglicher Bergrat, resident of Friedehurg, Schlossstrasse 86 Freiberg, in the Kingdom of Saxony, Germany, have invented new and useful Improvements in the Extraction oi Copper from Raw Unroasted Ores and other Products, of which the following is a specification.

The extraction of copper from cor ores containing copper partly or whol y' in the form of sulfide has hitherto given unsatisfactory results which are due chiefly to the large amount of copper residues left in the extracted ore and to the very long time necessary to eilect the extraction.

The processes of extraction hitherto gen erally used (with the exception of experiments with ammonia and ammonium salts) for such ores are generally based upon'the setting tree of chlorin'from ferric chlorid v and the action of the former on sulfid of copper to form copper chlorid. It has also been proposed to treat pyrite-residues in such manner for copper that free chlorin is generated by the action of an acid on chlorid of lime or similar salts to act upon the residues. It has been furthermore proposed, when using-hydrochloric acid to act on ores and the like, to assist the reaction by the concurrent development of free chlorin.

According to the present process the transformation of copper sulfid to copper chlorid is exclusivel e ected by means or free chlorin whic is obtained from dioxid of manganese by the action of an acid; In carrying out the process the finely divided ores are-saturated with hydrochloric acid or a mixture of hydrochloric acid and sulfuric acid after a certain amount of diom d of inanga nese has been added to the ores. The

Specification of Letters Patent.

Application filed M137 a2, 1508.

Patented Got, 26, 198% ser al No. 444,779.

strength of the hydrochloric acid must be such that chlorin can be obtained by the action of the acid on the dioxid of manganese without the necessity of heating and should be about 125 Baum. The amount of the dioxid of manganese varies according to the percentage of copper suliid and may amount to 0.25% of the whole amount of the ore in the case of poor ores. The copper solution obtained is then further treated in any well known -1nanner.

Now what I claim and desire to secure by Letters Patent is the following:

i. The process of'treating copper ores and other products containing copper wholly or partially in. the form of sulfide by the action thereon of chlorin which process consists in causing free chlorin to be generated in the mass to be treated by adding thereto a certain amount of dioxid of manganese and treating the mixture with a solution containin hydrochloric acid of suitable strength substantially as described.

2. The process or treating copper ores and other'products containing copper wholly or partially in the form of sulfide by the action thereon of chlorin which process consists in causing free chlorin to be generated in the mass to be treated by adding thereto a cer-' .tain amount or dioxid of manganese and treating the mixture with a mixture of hy drochloric and sulfuric acid.

In testimony, that l claimthe foregoing as my invention, 1 have signed my name n resence of two witnesses this eleventh da" P 7 3 of'July 1908. v

GEORG SCHNEEDER.

Witnesses:

Fnmnmcn Konenon,

. Hnucnnm. 

